You have a ground loop. You need to transformer isolate the interconnect.
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subwoofer hum, im stumped
Dayton Audio T1504K 15" Titanic Mk 4 1000 Watt Subwoofer Kit
I am having a strange issue with the above kit. The subwoofer emits a very low hum when I plug it into my wall outlet. Since I have an outlet every 8ft. I tried multiple outlets with the same result. I then tried different power cables. (even the cable from my B&W ASW 15" 1,000 watt amp with the same results. I then tried switching out the RCA cables. Same issue. The only time I do not hear any hum is when I use a cheater plug. But then the sub is NOT grounded. Any suggestions?
I am using a Denon 4311CI receiver with a Y cable to power both 15" subs. The 2nd sub out is used for 2 passive 15" Dayton Ultimax subs. On the rear of the Titanic plate amp I am using the LFE out. Would it make a difference if I bought a Y cable and connected to left and right out into a single rca back to my amp? Should I change any of the settings on the plate amp itself? The EQ settings or anything. I just cant figure out why its humming. Im out of ideas and need your help.
I am having a strange issue with the above kit. The subwoofer emits a very low hum when I plug it into my wall outlet. Since I have an outlet every 8ft. I tried multiple outlets with the same result. I then tried different power cables. (even the cable from my B&W ASW 15" 1,000 watt amp with the same results. I then tried switching out the RCA cables. Same issue. The only time I do not hear any hum is when I use a cheater plug. But then the sub is NOT grounded. Any suggestions?
I am using a Denon 4311CI receiver with a Y cable to power both 15" subs. The 2nd sub out is used for 2 passive 15" Dayton Ultimax subs. On the rear of the Titanic plate amp I am using the LFE out. Would it make a difference if I bought a Y cable and connected to left and right out into a single rca back to my amp? Should I change any of the settings on the plate amp itself? The EQ settings or anything. I just cant figure out why its humming. Im out of ideas and need your help.
1 - 20 of 45 Posts
Try using a a grounded/balanced input if possible. Can the amps accept balanced if so the 4311 chassis ground screw can serve as the connection point for the third wire.
the 4311 only has rca connectors no xlrI can understand the ground loop but why is it only happening to 1 sub and not the other. They are both RCA plate amps. B&W ASW 855 is a 1,000 watt 15" driver and the Dayton Titanic is a 1,000 watt 15" driver. Confuse as to why the Dayton hums but the B&W does not. They are both using the same Y cable from the rear of my receiver. ifits a ground loop shouldn't both be humming? Just curious.
is this what I need? http://www.parts-express.com/ground-loop-isolator--265-012
Quote:
Originally Posted by Bill Fitzmaurice /t/1519467/subwoofer-hum-im-stumped#post_24398802
You have a ground loop. You need to transformer isolate the interconnect.
is this what I need? http://www.parts-express.com/ground-loop-isolator--265-012
Some amps have better internal grounding protocols than others. Unbalanced connections are an invitation for ground loops, as are remotely placed amps. The combination of the two almost guarantees them unless the amp is very well engineered.Quote:
Originally Posted by rlhaudio /t/1519467/subwoofer-hum-im-stumped#post_24398873
ifits a ground loop shouldn't both be humming?
That should do it.Quote:
is this what I need? http://www.parts-express.com/ground-loop-isolator--265-012
The 4311 doesn't need the xlr cable for what I was saying. The little screw on the back of the avr can serve as the balanced wire running to the "amp". Try just hooking an iPod/phone directly to your amp without the avr and see if it hums. If doesn't then can just add the wire. If does hum then would use bills advice.
ok, thanks Ill give it a try
What was the result of this? I am having the same issue with a Dayton sub kit.
Just out of curiosity do either of you have Directv?
Almost all CATV/SATV rigs are poorly engineered with respect to ground loop issues, even a simple direct cable connection without a convertor box. Transformer isolation of the cable connection is almost always required.Quote:
Originally Posted by cessna1466u /t/1519467/subwoofer-hum-im-stumped#post_24787221
Just out of curiosity do either of you have Directv?
Will that have any effect on FR?
I get hum through my subs connected through Ep4000's from RCA > XLR from my reciever.
I was wondering if I needed a cable isolator or an RCA isolator for the amps.... my cable looks poorly grounded but It's not connected to anything down here (no cable tv) only the internet modem.
Quote:
Originally Posted by Bill Fitzmaurice /t/1519467/subwoofer-hum-im-stumped#post_24398974
Some amps have better internal grounding protocols than others. Unbalanced connections are an invitation for ground loops, as are remotely placed amps. The combination of the two almost guarantees them unless the amp is very well engineered.
That should do it.
Will that have any effect on FR?
I get hum through my subs connected through Ep4000's from RCA > XLR from my reciever.
I was wondering if I needed a cable isolator or an RCA isolator for the amps.... my cable looks poorly grounded but It's not connected to anything down here (no cable tv) only the internet modem.
If you use an isolation transformer it may reduce bandwidth. You want to check the specs.Quote:
Originally Posted by Thatsnasty /t/1519467/subwoofer-hum-im-stumped#post_24787577
Will that have any effect on FR?
I get hum through my subs connected through Ep4000's from RCA > XLR from my reciever.
I was wondering if I needed a cable isolator or an RCA isolator for the amps.... my cable looks poorly grounded but It's not connected to anything down here (no cable tv) only the internet modem.
I had the same issue and could not get rid of the ground loop, tried everything isolators,conditioners you name it nothing worked.
Accidentally I noticed an advertising for a Product that I thought would be another waste of time and ignored it.
Then after some time I noticed this product again it came up on my iPad , so I sent for one and well it worked beautifully no more hum. Best deal yet.
It is called the Hum-X and the company's link is www.Ebtechaudio.com , I spoke with a tech who was very helpful. There's a video on the site that demonstrates how it works. Just plug the three prong into the hum-x just like the cheater plug however this setup has a three prong on it maintaining proper ground. I bought mine from www.Bhphotovideo.com
Good luck.
PeterV
Quote:
Originally Posted by rlhaudio /t/1519467/subwoofer-hum-im-stumped#post_24398783
Dayton Audio T1504K 15" Titanic Mk 4 1000 Watt Subwoofer Kit
I am having a strange issue with the above kit. The subwoofer emits a very low hum when I plug it into my wall outlet. Since I have an outlet every 8ft. I tried multiple outlets with the same result. I then tried different power cables. (even the cable from my B&W ASW 15" 1,000 watt amp with the same results. I then tried switching out the RCA cables. Same issue. The only time I do not hear any hum is when I use a cheater plug. But then the sub is NOT grounded. Any suggestions?
I am using a Denon 4311CI receiver with a Y cable to power both 15" subs. The 2nd sub out is used for 2 passive 15" Dayton Ultimax subs. On the rear of the Titanic plate amp I am using the LFE out. Would it make a difference if I bought a Y cable and connected to left and right out into a single rca back to my amp? Should I change any of the settings on the plate amp itself? The EQ settings or anything. I just cant figure out why its humming. Im out of ideas and need your help.
I had the same issue and could not get rid of the ground loop, tried everything isolators,conditioners you name it nothing worked.
Accidentally I noticed an advertising for a Product that I thought would be another waste of time and ignored it.
Then after some time I noticed this product again it came up on my iPad , so I sent for one and well it worked beautifully no more hum. Best deal yet.
It is called the Hum-X and the company's link is www.Ebtechaudio.com , I spoke with a tech who was very helpful. There's a video on the site that demonstrates how it works. Just plug the three prong into the hum-x just like the cheater plug however this setup has a three prong on it maintaining proper ground. I bought mine from www.Bhphotovideo.com
Good luck.
PeterV
I had a similar problem with a Behringer iNuke amp and asked for help: http://www.avsforum.com/t/1533186/help-troubleshooting-inuke-nu6000dsp-buzz-hum-at-sub
My problem was fixed by grounding my cable-TV service where it enters my house. I would never have looked there but someone suggested it here.
Good luck!
My problem was fixed by grounding my cable-TV service where it enters my house. I would never have looked there but someone suggested it here.
Good luck!
Thanks for that post. I was seriously thinking of cutting holes and making it passive. The isolator did nothing. I even ran a 50 ft extension cord to other outlets which didn't help. I even tried a different RCA cable. NOTHING worked. Now it sits unplugged and a waste of $700.00. Upset that Parts Express has no idea this is happening. Maybe we are the only 2. lol I'll buy the Hum X and pray it works.
Again, thank you.
Frustrated.
Again, thank you.
Frustrated.
Send that useless isolator back get your money to. They all make claims and don't deliver, the only one that has worked is this hum-x .
I checked my ground at the cabl/tv's entrance and all looks good wires are connected.
PeterV
Quote:
Originally Posted by rlhaudio /t/1519467/subwoofer-hum-im-stumped#post_24792892
Thanks for that post. I was seriously thinking of cutting holes and making it passive. The isolator did nothing. I even ran a 50 ft extension cord to other outlets which didn't help. I even tried a different RCA cable. NOTHING worked. Now it sits unplugged and a waste of $700.00. Upset that Parts Express has no idea this is happening. Maybe we are the only 2. lol I'll buy the Hum X and pray it works.
Again, thank you.
Frustrated.
Send that useless isolator back get your money to. They all make claims and don't deliver, the only one that has worked is this hum-x .
I checked my ground at the cabl/tv's entrance and all looks good wires are connected.
PeterV
Have you hooked up a phone to the input(s)???? I'm trying to give easy advice how to fix this but dont think my input has been tried. Use a headphone to "whatever" cable you want to use and only use the phone and amplifier to test the signal!! If no buzz/hum then can proceed further by adding a third wire to you RCA cables which will ground the signal from avr to amplifier and eliminate the problem. Been there done it fixed it when nothing else worked!
Edit. You kind of responded to one of my previous posts by saying your 4311 does have xlr outputs. I know and neither does "mine". It has a ground screw on the back that will serve as the third wire if the phone test proves its a problem between the avr and amp. I too have many other amps that didnt hum/buzz but one that did and this was the only way I could find to fix it.
Quote:
Originally Posted by rlhaudio /t/1519467/subwoofer-hum-im-stumped#post_24792892
Thanks for that post. I was seriously thinking of cutting holes and making it passive. The isolator did nothing. I even ran a 50 ft extension cord to other outlets which didn't help. I even tried a different RCA cable. NOTHING worked. Now it sits unplugged and a waste of $700.00. Upset that Parts Express has no idea this is happening. Maybe we are the only 2. lol I'll buy the Hum X and pray it works.
Again, thank you.
Frustrated.
Have you hooked up a phone to the input(s)???? I'm trying to give easy advice how to fix this but dont think my input has been tried. Use a headphone to "whatever" cable you want to use and only use the phone and amplifier to test the signal!! If no buzz/hum then can proceed further by adding a third wire to you RCA cables which will ground the signal from avr to amplifier and eliminate the problem. Been there done it fixed it when nothing else worked!
Edit. You kind of responded to one of my previous posts by saying your 4311 does have xlr outputs. I know and neither does "mine". It has a ground screw on the back that will serve as the third wire if the phone test proves its a problem between the avr and amp. I too have many other amps that didnt hum/buzz but one that did and this was the only way I could find to fix it.
Please tell which screw on the back of reciever to amp are you connecting the wire . A diagram would be nice.
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A good many people would like this information please and thank you very much.
PeterV
Quote:
Originally Posted by audiovideoholic /t/1519467/subwoofer-hum-im-stumped#post_24793274
Have you hooked up a phone to the input(s)???? I'm trying to give easy advice how to fix this but dont think my input has been tried. Use a headphone to "whatever" cable you want to use and only use the phone and amplifier to test the signal!! If no buzz/hum then can proceed further by adding a third wire to you RCA cables which will ground the signal from avr to amplifier and eliminate the problem. Been there done it fixed it when nothing else worked!
Edit. You kind of responded to one of my previous posts by saying your 4311 does have xlr outputs. I know and neither does "mine". It has a ground screw on the back that will serve as the third wire if the phone test proves its a problem between the avr and amp. I too have many other amps that didnt hum/buzz but one that did and this was the only way I could find to fix it.
Please tell which screw on the back of reciever to amp are you connecting the wire . A diagram would be nice.
A good many people would like this information please and thank you very much.
PeterV
1 - 20 of 45 Posts
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